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From: Bruce Momjian <pgman@candle.pha.pa.us>
Message-Id: <200209031859.g83IxYc11327@candle.pha.pa.us>
Subject: Re: VERY SMALL DOC BUG:
	http://www.postgresql.org/idocs/index.php?sql-createtable.html
In-Reply-To: <200209031512.g83FCx617971@janning.planwerk6.local>
To: Janning Vygen <vygen@planwerk6.de>
Date: Tue, 3 Sep 2002 14:59:34 -0400 (EDT)
Cc: pgsql-docs@postgresql.org
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Looks like this is already fixed in 7.3, due out in a few months:

    A not-null constraint is always written as a column constraint.  A
    not-null constraint is equivalent to creating a check constraint
    <literal>CHECK (<replaceable>column_name</replaceable> IS NOT
    NULL)</literal>, but in <productname>PostgreSQL</productname>

---------------------------------------------------------------------------

Janning Vygen wrote:
> Hi,
> 
> In document 
> http://www.postgresql.org/idocs/index.php?sql-createtable.html
> 
> it says (Parameters, third section):
> 
> NOT NULL
>      The column is not allowed to contain NULL values. This is  
> equivalent to the column constraint CHECK (column NOT NULL). 
> 
> At the end it must say:
> 
> CHECK (column IS NOT NULL).
>               ^^
> 
> thanks for maintaining/developing postgresql!! Great database!
> 
> kind regards,
> janning
> 
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